CD74HCT138MTE4

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed, CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The CD74HCT138MTE4 is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is commonly used in digital electronics to select one of multiple output lines based on the input code.
• Packaging/Quantity: The CD74HCT138MTE4 is typically sold in reels or tubes containing a specific quantity of ICs.

Specifications

• Logic Family: HCT
• Number of Inputs: 3
• Number of Outputs: 8
• Supply Voltage: 2V - 6V
• Propagation Delay: 15 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

The CD74HCT138MTE4 has a total of 16 pins arranged as follows:

+---+--+---+ A0 --|1 +--+ 16|-- Vcc A1 --|2 15|-- Y0 A2 --|3 14|-- Y1 GND --|4 13|-- Y2 /E1 --|5 12|-- Y3 /E2 --|6 11|-- Y4 /E3 --|7 10|-- Y5 Y7 --|8 9|-- Y6 +----------+

Functional Features

• Converts a 3-bit binary input into one of eight output lines.
• Enables the selection of a specific output line based on the input code.
• High-speed operation suitable for various digital applications.
• CMOS logic ensures low power consumption and compatibility with other ICs.

Advantages

• Compact SOIC package allows for space-efficient PCB design.
• Wide supply voltage range enables flexibility in different power supply configurations.
• Fast propagation delay ensures quick response time in decoding operations.
• CMOS technology provides low power consumption and noise immunity.

Disadvantages

• Limited number of inputs and outputs restricts the complexity of decoding operations.
• Not suitable for applications requiring higher bit decoding or multiplexing.

Working Principles

The CD74HCT138MTE4 operates by decoding a 3-bit binary input (A0, A1, A2) and activating the corresponding output line (Y0-Y7). The /E1, /E2, and /E3 pins are used to enable or disable the decoder/demultiplexer. When enabled, the selected output line is driven to a logic high level, while all other output lines remain at a logic low level.

Detailed Application Field Plans

The CD74HCT138MTE4 can be used in various applications, including:

1. Address Decoding: Selecting memory banks or peripheral devices based on address inputs.
2. Data Demultiplexing: Distributing data from a single source to multiple destinations.
3. Control Signal Generation: Generating control signals for different system components.
4. Digital Instrumentation: Multiplexing input signals for display or measurement purposes.

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the CD74HCT138MTE4 include:

1. 74HC138: Similar functionality but operates at a lower voltage range.
2. CD4514: 4-to-16 line decoder/demultiplexer with additional features.
3. SN74LS138: TTL logic family decoder/demultiplexer with different characteristics.

These alternative models offer similar decoding capabilities but may have different specifications and package options.

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